Q. Solve the equation for all values of x.∣3x−8∣=5xAnswer: x=
Consider Two Cases: We have the equation ∣3x−8∣=5x. To solve this, we need to consider two cases because the absolute value expression can be positive or negative.
First Case: Non-Negative Expression: First case is when the expression inside the absolute value is non-negative, which means 3x−8≥0. In this case, we can drop the absolute value bars and solve 3x−8=5x.
Solve for x: Subtract 3x from both sides of the equation 3x−8=5x to get −8=2x.
Check x=−4: Divide both sides by 2 to isolate x, which gives us x=−4.
Second Case: Negative Expression: We need to check if x=−4 satisfies the original equation ∣3x−8∣=5x. Substitute x=−4 into 3x−8 to get 3(−4)−8=−12−8=−20. The absolute value of −20 is 20, which is not equal to 5(−4)=−20. Therefore, x=−4 does not satisfy the original equation.
Solve for x: The second case is when the expression inside the absolute value is negative, which means 3x - 8 < 0. In this case, we solve the equation −(3x−8)=5x.
Check x=1: Distribute the negative sign inside the parentheses to get −3x+8=5x.
Check x=1: Distribute the negative sign inside the parentheses to get −3x+8=5x.Add 3x to both sides of the equation −3x+8=5x to get 8=8x.
Check x=1: Distribute the negative sign inside the parentheses to get −3x+8=5x. Add 3x to both sides of the equation −3x+8=5x to get 8=8x. Divide both sides by 8 to isolate x, which gives us x=1.
Check x=1: Distribute the negative sign inside the parentheses to get −3x+8=5x. Add 3x to both sides of the equation −3x+8=5x to get 8=8x. Divide both sides by 8 to isolate x, which gives us x=1. We need to check if x=1 satisfies the original equation ∣3x−8∣=5x. Substitute x=1 into −3x+8=5x1 to get −3x+8=5x2. The absolute value of −3x+8=5x3 is −3x+8=5x4, which is equal to −3x+8=5x5. Therefore, x=1 does satisfy the original equation.
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